Preheat oven to 350 degrees.

Prepare stuffing mixes according to directions on boxes. Place in a large bowl.

Saute onions in olive oil to light brown, stirring often. Add onions and tarragon to stuffing.

Scoop stuffing into 12 paper-lined muffin tins and bake for 35 minutes until tops are lightly brown.

After cooling, place muffins in large plastic bag to freeze until needed.